Genetic diversity in fatty acid composition and antioxidant capacity of Nigella sativa L. genotypes

Abstract A study was conducted to explore the suitability of Nigella sativa L. oil for human consumption on the basis of fatty acid (FA) composition in twenty three selected genotypes. Total oil content ranged from 147 to 270 ml/kg. Eleven fatty acids including palmitic, oleic, and linoleic acids were found during fatty acid methyl esters (FAME) analysis. Linoleic acid was major contributor in the range of 608.9 ml/l (AN-15) to 713.9 ml/l (AN-8). Saturated fatty acids ranged from 121 to 181 ml/l in genotype AN-23 and AN-3, respectively. Significant genetic variation was observed with respect to mono-unsaturated fatty acids. Poly-unsaturated fatty acid being dominant existed in the range of 651–771 ml/l. Metabolic capacity to inter-conversion of fatty acids and nutritive value of Nigella oil is described on the basis of various fatty acid ratios. Multivariate analysis revealed that, oil content has positive correlation with linoleic acid. The Euclidean based clustering revealed, that genotypes AN-23, AN-5, AN-8, AN-9, AN-10, AN-11, AN-19, AN-21 and AN-24 are suitable for trait specific breeding programme for higher oil content, increased linolenic and reduced palmitic acid with higher nutritive value. Genotype AN-4 exhibited good combination of higher polyunsaturated fatty acids (PUFA) as well as oxidative stability.